No word yet on the new baby's name. Check out a picture of the couple at Huffington Post.

Just before the birth, Kim Lowe sounded anxious for it to be over. "If I get sucker-punched in the ribs one more time, I may start fighting back. Holy Toledo...Ouch!!!! (ninja growing in there for sure)!!!"

Amazing that women in labor can still find the strength to pull out their phones and tweet.

Lowe, 44, is a star of Pretty Little Liars on ABC Family, is the younger brother of actor Rob Lowe and the former husband of Hilary Swank.

He and Kim, a producer, met in 2007, welcomed Mabel, now 3, in 2009, and married in August 2010.